HY8 (GLYMA_19G224200V4) — Glycine max

Summary

GmHY8 (GLYMA_19G224200V4) encodes a protein of the phytochrome A-E family that contains PAS, GAF, and histidine kinase domains and exhibits photoreceptor activity, tetrapyrrole binding, and DNA-binding transcription activator activity. This soybean gene on chromosome 19 is associated with far-red light sensitivity, light quality response, and phytochrome-mediated photoresponses, as well as days to maturity, grain yield, seed set percent, vegetative vigor, leaf area, leaf angle, branch angle, and plant growth hormone response. It is linked to flower color, inflorescence length, carpel morphology, fruit set, and heterosis. Additional associations include heat shock tolerance, decreased oxidative stress response, root development, relative shoot elongation under submergence, and glyphosate sensitivity. Studies of related genes in other species link the phytochrome A family to far-red light signaling, flowering, thermotolerance, pathogen defense, and shade-induced hypocotyl elongation.